Method for determining the pellet size distribution of a pelletizer and for controlling the output of such pelletizer
AssigneeOwens-Corning Fiberglas Corporation
InventorCharles M. Hohman
Life of this patent
Estimating the term…
Abstract
Water and particulate material are placed in the pelletizer and the pelletizer rotated. The size distribution of pellets at the output of the pelletizer is controlled by altering the amount of water, or particulate material injected into the pelletizer. The output of the pelletizer is screened into two or three discrete sized groups. The groups are periodically weighed and the ratios of their weight are compared to a predetermined standard or to the ratios of the weights of a previous set of groups. The amount of water injected into the system is altered responsively to an excess weight of either the smaller or the larger sized pellets.
Claims15
A method for controlling the size distribution of pellets produced by a pelletizer comprising the steps of:
- (a) adding particulate material to a pelletizer;
- (b) adding liquid to the pelletizer;
- (c) operating said pelletizer to produce pellets;
- (d) separating such produced pellets into at least two groups of separate and distinct pellet sizes;
- (e) weighing the separated groups;
- (f) comparing a ratio of the weights of said groups to a predetermined standard to determine the pellet size distribution produced by said pelletizer;
- and
- (g) controlling the adding of at least one of the particulate material and the liquid to said pelletizer in response to said compared weights to obtain a predetermined pellet size distribution from said pelletizer.
A method of controlling the size of pellets produced by a pelletizer comprising the steps of:
- (a) adding particulate material to a pelletizer;
- (b) adding liquid to the pelletizer and simultaneously operating said pelletizer to produce pellets;
- (c) separating the produced pellets into a plurality of pellet size groups by screening said produced pellets and directing all pellets smaller than a lower size limit into a first group and all pellets larger than an upper size limit into a second group;
- (d) weighing each of said groups;
- (e) comparing the ratios of the weights of said groups to a predetermined standard to determine the pellet size distribution produced by the pelletizer;
- and
- (f) controlling the adding of at least one of the particulate material and the liquid to said pelletizer in response to said comparison of said weight ratios to said standard to obtain a predetermined pellet size distribution from said pelletizer.
Dependencies are inferred from the claim text.